package com.ym.utils.cmDateUtils;

import org.apache.commons.lang3.time.DateFormatUtils;
import org.springframework.util.ObjectUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

/**
 * @ClassName DateUtil
 * @Description TODO
 * @Author 晨曦
 * @Date 2019/12/19 16:56
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {

    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};


    public static Date getDateForStr(String str) {
        Date date = null;
        try {
            date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(str);
        } catch (Exception e) {
            System.out.println(e);
        }
        return date;
    }

    public static String getDateForStrYM(Date date) {
        String now = new SimpleDateFormat("yyyy-MM").format(date);
        return now;
    }

    public static String getDateForStr(Date date) {
        String now = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
        return now;
    }


    public static String getDateSubtractionOneYear(String str) {
        String reStr = null;
        try {
            Date date = new SimpleDateFormat("yyyy-MM").parse(str);
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.add(Calendar.YEAR, -1);//当前时间减去一年，即一年前的时间    
            calendar.getTime();//获取一年前的时间，或者一个月前的时间  
            Date dt1 = calendar.getTime();
            reStr = sdf.format(dt1);
        } catch (Exception e) {
            System.out.println(e);
        }

        return reStr;
    }

    public static String getDateSubtractionOneMonth(String str) {
        String reStr = null;
        try {
            Date date = new SimpleDateFormat("yyyy-MM").parse(str);
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.add(Calendar.MONTH, -1);//当前时间前去一个月，即一个月前的时间    
            calendar.getTime();//获取一年前的时间，或者一个月前的时间  
            Date dt1 = calendar.getTime();
            reStr = sdf.format(dt1);
        } catch (Exception e) {
            System.out.println(e);
        }
        return reStr;
    }


    public static String getUTCTime() {
       /* DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime dateTime = LocalDateTime.now(ZoneOffset.UTC);
        String localTime = formatter.format(dateTime);
        return localTime;*/
        Date date = new Date();  // 对应的北京时间
        SimpleDateFormat bjSdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        bjSdf.setTimeZone(TimeZone.getTimeZone("UTC"));
        String datesTR = bjSdf.format(date);
        return datesTR;
    }

    public static String getDateFormatString(String pattern, Date day) {
        if (ObjectUtils.isEmpty(pattern)) {
            pattern = "yyyyMMddHHmmss";
        }
        if (ObjectUtils.isEmpty(day)) {
            day = new Date();
        }
        SimpleDateFormat bjSdf = new SimpleDateFormat(pattern);
        bjSdf.setTimeZone(TimeZone.getTimeZone("UTC"));
        return bjSdf.format(day);
    }

    /* public static void main(String[] args) {
         System.out.println(getUTCTime());
     }*/
    public static void main(String[] args) {
        int countNum = 9;
        int pageSize = 10;
        int pageNum = 0;
        if (countNum % pageSize == 0) {
            pageNum = countNum / pageSize;
        } else if (countNum % pageSize > 0) {
            pageNum = countNum / pageSize + 1;
        } else {
            pageNum = 0;
        }
        for (int a = 1; a <= pageNum; a++) {
            System.out.println("执行" + (a - 1) * pageSize + "——" + a * pageSize + "条");
        }
        System.out.println(pageNum);
    }


    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }


}
